Screen Time does NOT block web downloads -- alternatives/workarounds needed

In Settings > Screen Time > Content & Privacy Restrictions > Store, Web, Siri & Game Center Content > Web Content, you can block sites either by blocking adult websites or allowing only approved websites. This works fine when it comes to blocking webpages, but it does NOTHING for downloads. For example, if you set it on "Only Approved Websites", which by default allows a few kids websites and blocks everything else, and then type a *download link* into the URL box of Safari (or any other browser or app that uses WebKit) -- the download goes through and you are able to download an entire file despite the fact that the domain that the file comes from is blocked. This is because the link is is a download link, not a webpage link. This bypass works for any website at all, and includes adult movies, images, applications -- whatever you want to download, you can download as long as you have the download link. How do I block downloads on WebKit in iOS?